Defendant must suffer a loss of control- can be a slow burn effect, no longer has to be sudden and temporary

As a result of a qualifying trigger which a) made the defendant fear serious violence b) as a result of things said or done which caused the defendant to feel a justifiable sense of being seriously wronged c) both

Would a person of the same age, sex, and self-restraint and tolerance as the defendant acted in the same or similar way to the defendant in the circumstances?